UN1779 — Formic acid

Class 8

Quick facts: UN1779

What it is
Formic acid with more than 85% acid by mass
Hazard class
8 (subsidiary 3)
Packing group
II
Label
Class 8 - Corrosive · Class 3 - Flammable Liquid
Packaging (49 CFR 173)
Exceptions §173.154 · Non-bulk §173.202 · Bulk §173.242
Air limit per package
Passenger aircraft: 1 L · Cargo aircraft: 30 L
Special provisions
B2, B28, IB2, T7, TP2

Source: 49 CFR 172.101 Hazardous Materials Table — UN1779 (2025-01-01)

UN Number
UN1779
Hazard Class
8 (sub-risk 3)
Packing Group
II

Hazard Labels / Marks

  • Class 8 - Corrosive
  • Class 3 - Flammable Liquid

Source: 49 CFR §172.101 Hazardous Materials Table · 49 CFR §172.101 (2025-01-01)

Reference data transcribed from the published Dangerous Goods List. It is not legal advice and may not capture entry-specific exceptions, special provisions or packing-group ranges. Always verify against the current regulation edition for a specific shipment.

This is the reference entry for UN1779.

To verify your actual package — labels, marks, SDS and packaging — scan it with DG Inspector. It reads the real evidence in front of you and shows the reasoning so you can check it.

A reference lookup is a dictionary, not a compliance verdict. It tells you what UN1779 requires; it cannot confirm that your specific shipment meets those requirements.

Scan your package — Start Free